When you are purchasing a dual-SIM mobile phone, you may often see terms such as single-mode, dual-mode, single-standby, dual-standby, single-pass, and dual-pass. Careless friends may ignore these, but in fact these parameters are very important. What do these nouns mean? Don’t worry, please read on.
1. Mode: single mode, dual mode
Mode refers to the network standard supported by the mobile phone, which can be divided into single mode, dual mode and multi-mode.
1. Single-mode: means that the SIM card can only use one network standard.
2. Dual-mode: The mobile phone card can use two network standards at the same time. Such as GSM, WCDMA network.
3. Multi-mode: One SIM card can support more than two networks at the same time, such as FDD-LTE, TD-LTE, WCDMA, etc.
Taking single-SIM mobile phones as an example, they can be divided into three categories: single-SIM single-mode, single-SIM dual-mode and single-SIM multi-mode. Dual-SIM mobile phones are similar. However, it should be noted that many dual-SIM mobile phones with dual 4G mobile phones do not mean that both cards support the 4G network. The secondary card may only support the 2G network.
Second, standby: single standby, double standby
Generally involves "Waiting" refers to dual-SIM mobile phones. So what is "on standby"? It refers to the status of a mobile phone with two SIM cards in the card slots. It can be divided into two types: dual-SIM dual standby and dual-SIM single standby.
1. Dual-SIM single standby: Two cards can be installed in the mobile phone. When one card is used, the other card is turned off.
2. Dual SIM card dual special: means that two SIM cards installed on the mobile phone can be used at the same time, and the two cards do not interfere with each other.
Nowadays, most dual-SIM machines are dual-standby, because single-standby can only allow oneIf the card remains powered on, it will be inconvenient to use. However, you still need to be careful when choosing a card, otherwise you will be cheated if you buy a single-standby mobile phone.
3. Pass: single pass, double pass
Dual-SIM dual-standby mobile phones are usually divided into two types: dual-SIM dual-standby single-pass and dual-SIM dual-standby dual-pass. Let me give you a detailed introduction below.
1. Dual-SIM dual-standby single-pass: means that two cards can be inserted into the mobile phone at the same time and support two different network modes. Both cards can be on standby at the same time, but when one of the cards is on call, At this time, the call from the other card cannot be made, and it will prompt that the call is in progress.
Such a mobile phone is actually very embarrassing, because if someone else calls you while you are answering the phone, there will be no call record or missed answer record on your phone. It’s easy for someone to mistakenly think you’re deliberately not answering the phone. Redmi 1 is dual SIM card, dual standby and single pass.
2. Dual SIM, dual standby and dual pass: means that two cards can be inserted into the mobile phone at the same time and support two different network modes. Both cards can be on standby at the same time, but when one of the cards is on call, When a call comes in from another card, it will also be displayed and can be transferred. If you have two mobile phone cards, it is best to buy a phone with dual SIM cards, dual standby and dual communication.
Friends who want to buy a dual-SIM mobile phone must have a clear understanding of single-pass and dual-pass. Many profiteers like to confuse concepts and sell dual-SIM dual-standby single-pass phones as dual-pass mobile phones. You need to pay more attention when purchasing dual-SIM mobile phones.